What Is Film Feed ?

• Film feed is the ability to provide the film required to wrap a load while keeping the tension of the film constant.
• As the load rotates the carriage must vary the supply of film with the demand of the load.
• A dancer roller reads the demand of the load and is the input for the control of the film feed.
• Controlling this constantly varying demand is critical to proper operation.

How To Control Film Feed ?

• ANALOG SENSOR : The dancer arm rotates a cam which sends a varying signal to the drive board which then sends a varying voltage to the motor. The larger the dancer displacement the larger the output voltage. The larger the output voltage the faster the film is fed.